Warnings not to go to Scotland can't stop Nancy Drew from setting out on a thrill-packed mystery adventure. Undaunted by the vicious threats, the attractive young detective--with her father and her two close friends--goes to visit her great-grandmother at an imposing estate of a missing family heirloom. And there is another mystery to be solved: the fate of flocks of stolen sheep. Baffling clues challenge Nancy's powers of deduction: a note written in the ancient Gaelic language, a deserted houseboat on Loch Lomond, a sinister red-bearded stranger in Edinburgh, eerie whistling noises in the Highlands. Startling discoveries in an old castle and in the ruins of a prehistoric fortress, on a rugged mountain slope and in a secluded glen, lead Nancy closer to finding the solutions to both mysteries. Recommended for ages 8 to 12.